As we know, high flexibility is very important for the grout, so, how can we test it? let's find out!
We fold two samples KASTAR and another brand at the same time.
The other sample is broken. Kastar is as good as before.
Kastar added the toughening agent from Belgium makes the tile grout more flexible.
Easy to cope with thermal expansion and cold shrinkage, so it has better flexibility and toughness.
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